Divisibility Check: Is 43 Divisible by 4?

To determine if the number 43 is divisible by 4, we apply the divisibility rule for 4:

• According to the rule, a number is divisible by 4 if the last two digits of the number, treated as a separate number, are divisible by 4.
• For the number 43, the last two digits are "43" itself.
• We now test if 43 is divisible by 4 by performing a simple division: $\frac{43}{4}$.

Dividing 43 by 4 gives us:

$\frac{43}{4} = 10.75$

Since 10.75 is not a whole number, 43 is not divisible by 4 without leaving a remainder.

Thus, the number 43 is not divisible by 4.

Therefore, the correct answer is No.